edrach Posted September 27, 2012 Share Posted September 27, 2012 I'm trying to go back to stock on our '97 impreza wagon (originally 3.900 and I had converted it to 4.111). Re-installed a 3.900 transmission along with a 3.900 rear diff from a '95 Brighton (tranny type 752VT4AA). For some reason, the inner joints don't want to pop into the diff. I've always felt there's no difference and I must be doing something wrong. Any thoughts? Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted September 27, 2012 Share Posted September 27, 2012 I doubt this is helpful, but recently someone else discovered there were 2 different sizes of circlip. Dunno exactly what this means - maybe someone else will know. Link to comment Share on other sites More sharing options...
edrach Posted September 27, 2012 Author Share Posted September 27, 2012 The solution has been discovered. It wasn't the axle, it was the rear diff. Altho it was a 3.900, it was JDM version and it takes an axle with 22 splines on the inside; USDM versions have grooves for 25 splines on the inside. As far as I know all '93 to 2001 Impreza use the same axles and 25 inner spline diffs. Link to comment Share on other sites More sharing options...
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